[alsa-devel] Debugging custom driver: BUG: pcmC0D0c:0 error

[Mike Crowe]

Hi folks,

I'm digging into a custom, embedded ALSA driver for some hardware we are
developing.  The basic functionality (interfacing with an soc/wm8990 codec)
is working fine.

We have a new library that we are adding which interfaces with the system
via OSS.  In preparation, I built the vrec/vplay functions, which also use
OSS, and they work fine with the OSS Emulation layer of ALSA.

I have enabled verbose printk and debug messages, and am seeing the
following entries in the log file.  Since I did not have these enabled
before I started integrating, I'm not sure if this is new, or if they have
been there for a while.

Are these a problem, or can I ignore these?

ALSA sound/core/pcm_lib.c:318: BUG: pcmC0D0c:0, pos = 230989824, buffer size
= 12304, period size = 769

[ 2018.944000] ALSA sound/core/pcm_lib.c:318: BUG: pcmC0D0c:0, pos = 65536,
buffer size = 65536, period size = 4096
[ 2020.304000] ALSA sound/core/pcm_lib.c:318: BUG: pcmC0D0c:0, pos = 65536,
buffer size = 65536, period size = 4096
[ 2021.660000] ALSA sound/core/pcm_lib.c:318: BUG: pcmC0D0c:0, pos = 65536,
buffer size = 65536, period size = 4096

TIA
Mike